Pedal apparatus for sewing machines and the like



H. BERGGRAF. PEDAL APPARATUS FOR SEWINGYMACHJNES AND THE LIKE.

APPLICATION FILED AUG-24. I921.

Patented May 16,- 19.22

it? time HANS BERGGRAF, OFSTAVANGER, NORWAY, ASSIGNOR TO MARTIN BERG, OF

. SANDEFJORD. NORWAY.

rnnanarranarns non snwino iuaon'mns AND THE LIKE.

,416,324. Specification of Lette s Patent! Patented May 16,1922.

Application filed August 24,1921. Serial No. 494,989. I

To all whom it may concern Be it known that I, HANs BERGGRAF, acitiv Zen of Norway, residing at Stavanger, Norway, have invented certain new and useful Improvements in Pedal Apparatus for Sewing Machines and the like, of which the following is a specification.

The present invention relates to a pedal apparatus which makes it possible to operate by foot sewing machines and the like which are designed and constructed for manually operation.

The apparatus isbuilt up so that it is easily possible to connect the same to the machine in question. It is only necessary to fasten a strap to the machine and hook the driving eyes upon the handle, whereafter the apparatus is ready for operation.

The invention is illustrated in the accompanying drawing in which v Figure 1 shows the apparatus seen from the side.

Figure 2 shows the apparatus seen from above.

Figure 3 shows the strap by means of which the apparatus is connected to the machine to be operated.

Figure 4 shows a detail.

In the drawing 1 denotes the bottom plate of the pedal apparatus. -2 is a block which is rigidly connected to the bottom plate and which is connected to the pedal plates, 4:, 5 by means of hinges 2l--. -3- is a standard which is fastened to the bottom plate and projects between the pedal plates 4- and -5. The standard carries a block 6, which serves as a support for the power transmission devices, which are kept in place by means of a cover plate -7 which is fastened to the block 6 by means of a screw 8-, whereby the block -6- and the cover plate are formed with recesses through which the transmission devices are passed. The power transmission devices consist of flexible tubes -l9-, with wires -10- of a suitable material (steel) arranged within the same. These wires are fastened to the pedal plates -et and -5 so that they are moved forward and back ward in the flexible tubes as the plates are moved up and down. At the other ends of the wires eyes 11- are arranged, which suitably are rotatably connected to the wires 10 proper by means of a swivel link '19.. The upper part of the flexible tubes are fixed ina strap '12 which in a suitable'manner can be connected to the machine to be operated. In the constructional form shown in the drawing the strap consists of a hoop-iron piece which at the fixing places 13 for the tubes -9- is twisted about 90 and formed after the tubes. For the fixation of the tubes -9 in the strap 12- a correspondingly formed shoe 15 is arranged which is fastened to the part -13 by means of a screw --l4.- 18 are screws which serve to fasten the strap to the machine to be operated.

The apparatus acts in the following manner. When one of the pedal plates is pressed downward drawing power is transmitted to the eye ll of the wire in question so that by means of the handle -l7- the shaft 16 of the machine may be driven. Whilst the one pedal plate in this way is pressed down the other plate is kept in its top position by means of the spring 20. In this manner the handle -1'7 is turned half a revolution. Thereupon the other pedal plate is pressed down, whilst the first plate is released and again lifted by the spring 20, whereby another half revolution of the handle -17- is performed etc.

On account of the flexible tube 9-- the pedal apparatus may be placed at any suitable distance from the machine to be driven.

The invention is not restricted to the employment of two pedal plates. In many cases a single pedal plate may be used, provided that the operating parts are in possession of a sufficient moment of inertia. Also the other constructional details may be varied without surpassing the scope of the invention.

Having new particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A pedal apparatus ,for sewing machines and the like comprising a spring controlled pedal, a stationary standard in proximity to the outer end of the pedal, a machine engaging element, an elongated flexible casing having one end secured to the machine engaging element and the other end associated with the standard, a flexible element operating through the casing and having one end adapted to be connected with inner ends adapted for connection with the crank mechanism of the machine and'their outer ends connected with the pedals.

8. A pedal apparatuses claimed in claim 2 wherein the machine engaging element consists of a hoop-1ike strap of metal with the end portions twisted, and detachable shoes associated with the end portions for the securing of thetubes thereto.

In testimony whereof I afiix my signature.

HANS BERGGRAF. 

